[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f8Wh6akResHmS-Rj8gCJ6a_6KIxIDIFzEJL8tS23xLG8":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":24,"type":25},[],"2024-05-20 17:53:27",144848580,[8,9,10,11],"投掷铅球过程中,手不能出界","投掷铅球,球出手后,脚可以踩线","身体越强壮,投掷铅球一定投得越远","投掷铅球是复合运动,投掷成绩需要考虑身体强壮度、身高、臂长、技术掌握程度、赛场状态等多项因素",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},5,"37c3afc17e461544e9483550e700c579","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fddac1534b4ef307bc7cf3867087a0097.png","数学建模","91d693ed7cdd4424a25d050ce30d3d1a","4.1 习题","铅球投掷问题中,以下哪个表述是正确的",[21,26,35,44,53],{"answer":22,"createTime":5,"id":6,"options":23,"question":19,"source":24,"type":25},[],[8,9,10,11],"v1",0,{"answer":27,"createTime":5,"id":28,"options":29,"question":34,"source":24,"type":25},[],144848582,[30,31,32,33],"站直了向前投可以投得远,因为这样出手高度高","身体原地转一圈再投出去投得远,因为这样出手速度快","通过滑步提升出手速度,出手角度为斜向上40°左右投得远,综合考虑了出手速度和出手高度、角度","投掷铅球时让铅球水平方向投出去,这样给铅球的初速度全部是向前的方向,所以投得远","铅球掷远时,以下动作你认为正确的是",{"answer":36,"createTime":5,"id":37,"options":38,"question":43,"source":24,"type":25},[],144848584,[39,40,41,42],"模型一中最佳出手角度是45°","模型二中最佳出手角度是45°","出手高度增大,投掷距离变小","出手高度增大,最佳出手角度变大","铅球掷远问题中,以下表述正确的是",{"answer":45,"createTime":46,"id":47,"options":48,"question":51,"source":24,"type":52},[],"2025-06-14 01:31:32",200242017,[49,50],"正确","错误","铅球掷远时最佳出手角度与出手速度无关",3,{"answer":54,"createTime":46,"id":55,"options":56,"question":57,"source":24,"type":52},[],200242018,[49,50],"铅球掷远问题中,影响成绩最重要的因素是出手速度"]